Elliptical Bushing Pivot Pin for Smooth Seat Back Rotation
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Solution Overview
Problem
Existing seat assemblies with pivot mechanisms face challenges in providing smooth and stable rotational movement of the seat back, often resulting in limited adjustability and potential mechanical interference between components.
Innovation Solution
A seat assembly design featuring a pivot pin with an elliptical bushing configuration, where the pivot pin is rotatable about an axis with respect to the bushing, allowing for smooth rotation and adjustability, and a mounting bracket assembly with a base plate, cover plate, and bushing that supports the pivot pin and secondary pin, facilitating the seat back's rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pivot mechanism is used for seat back rotation, then the seat back can be adjusted, but the rotation may be rough and unstable due to mechanical interference
Solution Approach 1:
The patent introduces a bushing as an intermediary component between the pivot pin and the mounting bracket. The bushing acts as a mediator that reduces direct metal-to-metal contact and mechanical interference, enabling smooth rotation while maintaining stability. The bushing is disposed within a recess of the mounting bracket, creating a buffered interface that resolves the contradiction between smooth operation and rotational stability.
2Device complexity
If the pivot pin is mounted directly to the base plate, then the structure is simple, but mechanical interference occurs and rotation is not smooth
Solution Approach 1:
The patent employs a nested structure where the bushing is disposed within a recess of the mounting bracket, and the pivot pin rotates within the bushing. This nesting arrangement adds a rotational interface without significantly increasing overall structural complexity. The bushing is contained within the mounting bracket's recess, creating a compact nested configuration that enables smooth rotation while maintaining structural simplicity.
3Ease of manufacture
If the pivot pin contacts the base plate directly, then the mounting is straightforward, but mechanical interference prevents stable rotation
Solution Approach 1:
The bushing serves as a mediator component that is easily integrated into the mounting bracket's recess. The assembly process involves placing the bushing into the recess and then mounting the pivot pin, which is straightforward and does not require complex procedures. The bushing's presence as an intermediary component enables stable rotation without complicating the manufacturing or assembly process significantly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables smooth rotational movement of the seat back, enhancing adjustability and reducing mechanical interference, allowing for efficient assembly and disassembly, and providing a stable seating experience.
Implementation Method 1
The bushing may be disposed in the hole and may be mounted to the cover plate. The bushing may define a bushing opening that may receive the pivot pin.
Data Source
AI summary
A seat assembly having a seat back and a mounting bracket assembly. The seat back may have a pivot pin that may be rotatable about an axis. The mounting bracket assembly may be adapted to be mounted to a vehicle and may have a hole that may receive a bushing. The bushing may receive the pivot pin.